Paper-pulp-beating



(No Model.) 'f

. an.` PIGKLBS. PAPER PULP B'ATING. ENGINE.

nu "nu WM .nu Q

Imm l VUNITE .STATES JAMES D. PICKLES, OF BUCKLAND, CONEC'IICUT.`

PAPER-PULP-BEATING NGlNE.

lS?ECIIEICMLTIOLT forming part of Letters Patent No. 528,02*?, datedOctober 23, 1894. Application tiled January 3, 1894. Serial No. 495.565.(No model.)

Buckland, in thecounty` of Hartford and State of Connecticut, haveinvented certain new and useful Improvements in Paper-PulpleatingEngines, of which the following is a 1 Iull, clear, andexactdescription, whereby any one skilled inthe art'can make and use thesame. v

The object of my invention is to provide a beating engine for Work onpaper pulp or like material which shall have a greater efficiency undera given expenditure of `power than prior engines of the like class, andwhich will further have for a given size of vat a greater efficiency inthe treatment of the pulp.

To this end my invention consists mainly in the combination in a beaterengine of an inclined bed with a beater roll and in the combination ofsuch bed with a series of beater rolls; and it further consists in thedetails of the several parts making up the apparatus as a whole and inthe combination of such parts as more particularly hereinafter describedand pointed out in the claims.

Referring to the drawings: Figure 1 is a top or plan view of abeaterengine embodying my invention. Fig. 2 is a detail view in sideelevation of the engine with parts cut away to show construction.`

In the accompanying drawingsthe letter a `denotes a vat of suitable sizeand shape for holding the paper stockwhile it is being beaten and mixedby the action of the cutters. A diaphragm extends transversely of thevat between its sides forming a bed b, the front end b and the rear endb2 of the bed terminating short of the ends of the vat and thus leavingopenings which allow the Vertical flow of the more or less fluid mass ofpaper stock which is operated upon within the engine. The rear end ofthe bed is higher than the front end, and transversely of the bed and inits upper surface are secured bed plates c, c and c2, of a number equalto the number of rolls d, cl and d2 with which the vat is supplied.These rolls are mounted transversely of the vat in suitable bearingsandare provided withpulleys on their shafts by means of which they maybe rotated from a suitable source of power.

It is evident that the iiuid mass of pulp within'ithe vat will stand ata level if undisturbed and that when the bed is inclined the rollsarranged along its length will besubmerged to a greater or less extent,the first one of the series being the lowermost. The surfaces of therolls are provided with the usual cutter blades" and as' all of therolls turn in the same direction they serve to circulate the stock alongthe upper surface of the bed and to move it over the higher rear `end ofthe bed, the head, or difference in level of the fluidmass of `paperstock at opposite ends of the bed tending to promote a circulation ofthe stuff toward the frontend of the vat, and this difference in levelof the rolls aids the circulating motion which is imparted to thematerial by the rotation of the cutter bearing rolls. The ends of theroll shafts are each journaled in a yoke e that is adjustably supportedin a standardf fixed at the side of the vat. The yoke is supported on arod g the upper end of which is threaded and provided with a gear wheelg which has a threaded hub fitting the thread on the rod, the rotationof the gear wheel g serving to move the rod lengthwise for the purposeof raising or lowering the yoke and with it the roll suspended from it.The beater rolls in ordinary use in vats of this kind weigh about sixthousand pounds and the result of the beating and cutting operation ofthese rolls upon the stock depends upon the distance at which theperiphery of the roll, or the edges of the cutters borne in thatsurface, are moved with reference to the surfaces of the bed plates. Avery close contact of the cutter with the surface of the bed plateproduces a cutting action that reduces the fiber of the paper stock toany desired degree as to length and size.

It is desirable, particularly in wood pulp used as a stock, that therolls should be so adjusted with reference to the cutters that while thefull benefit of the weight of the roll is obtained to back up thecutting action the distance between the edges ofthe knives or cuttersand the surface of the bed plate should be such as to produce a brushingaction rather than a cutting, the result `of such action being asub-division of the ber rather than a shortening of it by any cuttingaction.

IOO

In order to provide for the setting of the rolls twice in successionwith accuracy at the same distance apart with respect to the surface ofthe bed plates so that the work of the f machine may not be largely amatter of judgment on the part of the operator, with no certainty inresults a counterpoise device is used.

By counterpoising the roll I am enabled to provide for a more accurateadjustment of I a lthe degree of separation of the cutters. The

counterpoise device consists of alever h supported on a pivot 't' with abracej extending through a socket or guide-way, preferably in thestandard and interposed between the lever and the yoke. The outer end ofthe le- Ver is provided with means forsupporting a weight lc.

A shaft Zextends across the vat supported in suitable bearings on theframe and bears 2o Worms Z whichl are in mesh with the worm gears gwhichare borne on the upperthreaded ends of the rods g as described. By meansofa hand wheel on this shaft -the beater rolls can be adjustedvertically for the purpose of setting the cutters at any desireddistance from the surface of the bed plates.

The vats are provided with suitable covers overlying the rolls so as toprevent the paper stock from being thrown out in the operation of themachine.

I claim as my`invention l. YIn a beater engine in combination with avat, a transverse bed substantially straight along its upper surface andinclined upward from front to rear, a series of cutter beds arv rangedat different levels along the bed, and a series. of beater rollsarranged at different levels along the bed with their peripheriesco-operating with the cutter beds, and means for driving the rolls, allsubstantially as described. l

2. In a beater engine in combination with a vat, a transverse bedsubstantially straight along its upper surface and inclined upward fromfront to rear and having bed plates, the beater rolls mounted in thevats, standards arranged on opposite sides of the bed, a yoke adjnstablysupported in each standard, the beater rolls having shaft bearings inthe yoke, and the counterpoise device including the lever, theconnecting rod and the counterpoise weight,all substantially asdescribed.

JAMES D. PICKLES. Witnesses:

' CHAS. L. BURDETT, W. F. PIoKLEs.

